12261876737 has 4 divisors (see below), whose sum is σ = 13376592816. Its totient is φ = 11147160660.

The previous prime is 12261876709. The next prime is 12261876743. The reversal of 12261876737 is 73767816221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12261876737 - 2⁸ = 12261876481 is a prime.

It is a super-2 number, since 2×12261876737² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12261876037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557358023 + ... + 557358044.

It is an arithmetic number, because the mean of its divisors is an integer number (3344148204).

Almost surely, 2^12261876737 is an apocalyptic number.

It is an amenable number.

12261876737 is a deficient number, since it is larger than the sum of its proper divisors (1114716079).

12261876737 is a wasteful number, since it uses less digits than its factorization.

12261876737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114716078.

The product of its digits is 1185408, while the sum is 50.

The spelling of 12261876737 in words is "twelve billion, two hundred sixty-one million, eight hundred seventy-six thousand, seven hundred thirty-seven".